Function On/Off; Cpa Limit; Tcpa Limit; Cpa Ring - JRC JMA-3400 Series Instruction Manual

Chapter 5 VARIOUS FUNCTIONS

5.24.2 FUNCTION ON/OFF

Turn on/off the function of TT and AIS.

5.24.3 CPA LIMIT

Set the distance to CPA (Closest Point of Approach). Use the cross key or the MULTI control to change the
value.
The CPA limit value can be set 0.0 NM or between 0.1 and 9.9 NM.
Note:
If "CPA" is set to 0.0NM, TT (CPA/TCPA) alarm will not be generated.
The TT (CPA/TCPA) alarm is an alarm that can be generated only with the TT function, and does not
generate an alarm with the AIS function.

5.24.4 TCPA LIMIT

Set the distance to TCPA (Time to CPA). Use the cross key or the MULTI control to change the value.
The TCPA limit value can be set 0min or between 1 and 99 min.
Note:
If "TCPA" is set to 0 min, TT (CPA/TCPA) alarm will not be generated.
The TT (CPA/TCPA) alarm is an alarm that can be generated only with the TT function, and does not
generate an alarm with the AIS function.

5.24.5 CPA RING

Set the display of CPA ring. While the distance of the specified CPA Limit value is used as the radius, the
CPA ring is displayed with a white circle of which center is the own ship's position.
The CPA ring is not displayed when the true vector mode is selected.

5.24.6 TARGET NUMBER DISPLAY

A target ID number is a value displayed beside the target symbol or AIS symbol. These numbers are
assigned to targets in acquisition order automatically. The start number can be specified by "Target Number
Allocation" (see "5.24.7 TARGET NUMBER ALLOCATION"). Each target is identified by the assigned ID
number until it is lost or its acquisition is canceled.
Turn on/off the number of tracking target and AIS symbol.
An ID number is always displayed for only targets with which numeric data is displayed.
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